diff --git a/reflex/base.py b/reflex/base.py
index 36b150c5c..a4c85e074 100644
--- a/reflex/base.py
+++ b/reflex/base.py
@@ -2,15 +2,16 @@
 from __future__ import annotations
 
 import os
-from typing import Any, List, Type
+from typing import Any, List, Type, Dict, Optional
 
 import pydantic
 from pydantic import BaseModel
-from pydantic.fields import ModelField
+from pydantic.fields import FieldInfo
 
 from reflex import constants
 
 
+# TODO: migrate to pydantic v2
 def validate_field_name(bases: List[Type["BaseModel"]], field_name: str) -> None:
     """Ensure that the field's name does not shadow an existing attribute of the model.
 
@@ -35,7 +36,8 @@ def validate_field_name(bases: List[Type["BaseModel"]], field_name: str) -> None
 
 # monkeypatch pydantic validate_field_name method to skip validating
 # shadowed state vars when reloading app via utils.prerequisites.get_app(reload=True)
-pydantic.main.validate_field_name = validate_field_name  # type: ignore
+# TODO
+#  pydantic.main.validate_field_name = validate_field_name  # type: ignore
 
 
 class Base(pydantic.BaseModel):
@@ -61,9 +63,10 @@ class Base(pydantic.BaseModel):
         Returns:
             The object as a json string.
         """
-        from reflex.utils.serializers import serialize
+        #  from reflex.utils.serializers import serialize
 
-        return self.__config__.json_dumps(self.dict(), default=serialize)
+        return self.model_dump_json()
+        #  return self.__config__.json_dumps(self.dict(), default=serialize)
 
     def set(self, **kwargs):
         """Set multiple fields and return the object.
@@ -85,7 +88,8 @@ class Base(pydantic.BaseModel):
         Returns:
             The fields of the object.
         """
-        return cls.__fields__
+        return cls.model_fields
+
 
     @classmethod
     def add_field(cls, var: Any, default_value: Any):
@@ -97,14 +101,10 @@ class Base(pydantic.BaseModel):
             var: The variable to add a pydantic field for.
             default_value: The default value of the field
         """
-        new_field = ModelField.infer(
-            name=var._var_name,
-            value=default_value,
-            annotation=var._var_type,
-            class_validators=None,
-            config=cls.__config__,
-        )
-        cls.__fields__.update({var._var_name: new_field})
+        field_info = FieldInfo(default=default_value, annotation=var._var_type)
+        cls.model_fields.update({var._var_name: field_info})
+        cls.model_rebuild(force=True)
+
 
     def get_value(self, key: str) -> Any:
         """Get the value of a field.
@@ -115,7 +115,7 @@ class Base(pydantic.BaseModel):
         Returns:
             The value of the field.
         """
-        if isinstance(key, str) and key in self.__fields__:
+        if isinstance(key, str) and key in self.get_fields():
             # Seems like this function signature was wrong all along?
             # If the user wants a field that we know of, get it and pass it off to _get_value
             key = getattr(self, key)